michelle obama delivered last night's top-ten list on the letterman show. here's two of the top-ten reasons to attend the democratic national convention. >> as a healthy alternative. we're using low-fat confetti. joe biden says it will be a big you know what deal. >> wait a minute. really? >> and mrs. obama's number one reason to watch the convention. drumroll, please. we'll findly find out who she is voting for. that was in question, wasn't it? >> indeed. you have to love the top ten. >>> your photos, videos and tweets online isn't enough for you. well, you might want to turn yourself into a walking social media display. >> the first wearable, programmable shirt. it's loaded with apps and tools to leave a lasting impression. the digital shirt is a prototype for now. it could be available to everyone if there is enough interest. >> it's made by the same interactive clothing company that created katy perry's light-up dress. wonder what they charge for something like that. >> you have to wonder. >> it's not cotton? >> we need more addictions to our phones, ri